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Add to SafariWhen comparing OSv vs Rumprun, the Slant community recommends Rumprun for most people. In the question“What are the best unikernels?” Rumprun is ranked 1st while OSv is ranked 3rd. The most important reason people chose Rumprun is:
Rumprun is multiplatform and can run on different types of platforms, including hypervisors (such as Xen and KVM) as well as running on bare hardware.
Question Ranking
Pros
Pro Quick booting
OSv is able to boot in less than a second.
Pro Amazing performance
Since OSv is created to run one single application on top of a hypervisor, it offers great performance and speed.
Pro Supports multiple platforms
OSv can run applications written in multiple programming languages and that run on multiple different platforms. Such as Java, C, Ruby, Node and Scala. With support for other languages on the way.
Pro Can run on bare hardware as well as hypervisors
Rumprun is multiplatform and can run on different types of platforms, including hypervisors (such as Xen and KVM) as well as running on bare hardware.
Pro Can be integrated to existing systems
Rump provides kernel-quality drivers for a variety of use-cases from filesystem to PCI device drivers. Because of this, they can be integrated into existing systems or can be run as standalone unikernels on hypervisors.
Cons
Con Can only run one application at a time
Since it tries to have maximum performance, OSv can only afford to run one application per hypervisor at a time.
Con Has some complexity added because it's not based on a language with process isolation
Since C and C++ (with which Rumprun is built) have no language level isolation, Rumprun doesn't have process isolation either. Because of this, sensitive components have to be split into different nodes, isolated by either different virtual machines or different computers.
